Hugh Jackman revealed to Katie Couric that he and his wife Deborra-Lee Furness went through some grueling emotional trials before adopting their son Oscar, 12, and daughter Ava, 7. »12/19/12 9:00am 12/19/12 9:00am

Although she's since deleted the tweet in question, has been addressing concerns about her rapidly-plummeting-off-the-chart song…